Acetylene burning iron



Patented June 11, 1935 ACETYLENE BURNING IRON Joseph L. Roberts, Jamaica, N. Y., assignor of one-half to Henry J. McCarthy, Baltimore, Md.

Application August 18, 1931, Serial No. 557,899

iron.

5 Claims.

This invention relates to an acetylene burning stables, it is extremely dangerous and generally against the rules to have an exposed llame which might set re to straw and the like found in large quantities in such places.

Furthermore,

if the flame is exposed in the vicinity of the branding tip, a sharply dened brand cannot be produced for the hair and skin surrounding the brand will be unintentionally burnt.

It therefore is the primary object of this inl;- vention to provide an acetylene burning iron whichv will heat a working head or'tip to a white heat by means of a highly concentrated and unexposed ame.

A further object/of the invention is to provide an acetylene burning iron which performs its intended Work in a very efficient manner and which is constructed of comparatively few parts,

cheaply and conveniently assembled to permitv of easy manipulation and repair.

Other objects and advantages of the invention will be apparent duringA a course of the following description. v

Fig. 1 is a side elevational view of the acetylene burning iron embodying this invention;`

Fig. 2 is a detail enlarged longitudinal sec'-V tional view partlyvbroken away of the handle portion, the adjacent stem portion and the outer end portion of the iron and including the combustion chamber and burning tool; Y

Fig. 3 is a transverse sectional view taken upon line 3 3 of Fig. 2; and y 1 Fig. 4 is a' transverse sectional view taken upon line 4 4 of Fig. 2. v n

In the drawing, wherein, for the purpose of illustration, is shown a preferred embodiment of this invention, the numeral 6 designates in its entirety the handle portion of the tool which includes a tubular metal core 'I having formed at one end a nipple 8 to which a exible pipe or the like 9 may be connected for supplying the iron with acetylene gas.

The remaining end of the passage.

An insulating grip I4 is suitably positioned upon the core 1. The front end of the grip I4 has suitably secured thereto a shield plate I5 which is 'intended to prevent the hand of the operator from accidentally moving beyond the end of the grip.

A stem I6 is designed to be connected to the forward end of the handle portion t3 and for this purpose includes an externally threaded shank I'Iv which is detachably threaded into `the bore of the socket IIL This shank portion Il is formed with a `circular series of radially opening, air inlet ports I8 which are positioned in radial alignment with the ared outer edge I2 of the socket I0. Adjacent the threaded shank iI of the stern I6, an enlarged tool engaging, polygonal 1301- tion I9 is provided on the stern. It will be noted that the inner end face of this enlarged portion I9`is spaced from the extremity of the arededge I2 to provide an inlet for air to the ports 8 by way of the bore of the enlarged edge I2. Re-

movably threaded within the shank portion il is ank apertured disc 20 which controls the volume ofk gas permitted to pass into the stern' I6. It

is to be understood that discs having different sized apertures may be provided for permitting different Volumes of gas to be supplied to the Working end of the iron.V

` The outer end of the stem I6 has suitably co-nnected theretoan elbow 2I to which is connected oney end of` a tubular combustion chamber 22.

This combustion chamber has formed in its bore a restricted, internally threaded portion 23 and two axially spaced inwardly projecting annular ribs 24 and 25. It willl be notedthat the rib 24 is spaced axially from the reduced threaded portion 23 a sucent distance to form an annular chamber or groove 26rwhle the remainingannular yrib 25 is located at the outer end of the comtion chamber 22 to constrict said end. e

vThe burning tool, designated in its entirety by the reference character 2l, is formed with a head 28 having the desired burning surface E29k which mayjtake the' form of one or more charactersfor branding purposes `or dierent shapes sutableforsurgical operations, principally performed by veterinarians. This head E8 is provided with a rearwardly extending flange 3i! which is formed with an outwardly flaring inner wall 30a. Projecting axially from the burning tool 2l is a shank SI having a threaded extremity 33- by means of which the tool may be connected to the internally threaded reduced portion Z3 formed in the combustion chamber 22. It will be noted that the shank 3l is positioned within the combustion chamber and extends axially there-- lishing communicationl between the pocket 3,4v

and the annular groove or pocket 26 formed within the chamber 22 by the rib 24 and the threaded portion 23.

vThe operation of this burning tool l-s as follows? Acetylene gas supplied to the handle portion by the tube 9 will flow through the saidhandle'pqytion and into the stem I6 where it will be mixed with air entering through the inlet ports 13. The gas will flow from the stem I6 into the elbow 2| and from the elbow into the pocket 3.4 of the tool shank 3l. The gas will leave Ythe pocket .3Al by way of the ports 35 and will flow from the groove.V

26 in the chamber axially through thek latter to be discharged from the outer restricted end 25 .of the chamber. The gas leaving t-his outerendof the chamber will, of course, be ignited and the flame which, due to the use of acetylene gas, wi-ll be a short blue name, will be discharged into. the

` conning groove or pocket formed in the heard of the tool between the wall 30e of the flange 30 and the exterior of the shank. This short blue flame will be entirely consumed. Within this annuay lar groove and will concentrate its heat atthe y bottom of the groove for raising the temperatiute` of the active surface 29 of the head to the desired whitevheat. The name will not .escape from the annular groove formed in the rhead 28. .and will not -be exposed in a manner which will produce a fire hazard if used around inflammable ma,..- terials. Due to the confining `of the flame Within the annular groove formed in the head of the tool, it will be impossible to burn ythe hair or skin surrounding the character branded an ,animal with the result that a very sharply defined brand will be produced.

lIt is to be understood that-the form of this tnvention herewith shown and .described is to ble taken as a preferred example of the same, and that various changes. in lthe shape, size and arrangement of'parts may be resorted to without departing from the spirit of the invention .or the scope of the subjoined claims.

Having thus described the inventionJ I A l. In an acetylene burning iron, a tubular handle, a tubular stem carried by the handle., an air supply inlet in the stem, a tubular combustion chamber in communication With saidl stem, said chamber having formed therein a. threaded reduced portion and two inwardly directed :annular ribs, one of said ribs bei-ng spaced axially of the threaded portion to form in the chamber an ,an-V

nular groove and the other rib being formed at the other edge of the chamber to constriet the same, and a burning tool having a shank of less diameter than the diameter of the combustion chamber at said ribs inserted in the chamber to be connected to the said threaded portion, said shank having a pocket formed therein in communication with the bore of the stem and with ports through the wall of the pocket to connect the latter with said annular groove.

2. In anacetylene burning iron, a tubular handle,l a. tubular stemcarried by the handle, an air supply inlet in the stem, a tubular combustion chamber in communication with said stem, said chamber having formed therein a threaded reduced portion and two inwardly directed annular ribs, one of said ribs being spaced axially o I the threaded portion to form in the chamber an annular groove and the other rib being formed at, the other edge of the chamber toconstrict the same and a burning tool having a shank of less diameter than the diameter of the combustionV chamber at seid ribs inserted in the chamber to be connected to the said threaded por@v wel' a head to be positioned beyond the end of the chamber, said shank having a pocket foune@ therein in communication with the bore of the steenY and with ports through the wall of the pocket to connect the letter with said annular groovel said head having a. rearwardly directed flange crmmg an annular flame confining pocket to receive the eme discharged from the constricted vend of the combustion ,Chambon 3.. In an acetylene burningiron, a tubular ban-Y die, a tubular Ystom carried by the handle, an supply inlet in the stem, a tubular combusf tion chamber in connection with the stem., said.

combustion chamber having a rib formed at the outlet end portion of the same .to constrict the 11eme, and a `burningtool hav-ing` a head formed with a rearwardly cechi-ng amefconnine, groove and e shank .mounted within the combustion. chamber of less diameter than the opening formed by- .the rib, said groove ycf the head bcspaced. from endcpposed to the outer end of i the combustion chamber.

4. In an acetylene burning iron, a tubular body, a tubular stem carried by the tbody, an air Vrsup-v ply inlet for thev stem, Yan annular combustion ccnnectedtc the stem, -said combustion chamber including `means for 'conining and directing the flame, and a burning tool having a.

head formed with a rearwardly opening flame confining groove supported at the outer end of .the-j combustion chamber with `the groove positioned to receive the fla-me fromrthe chamber.

Y 5.. man acetyleney burning iron., a burningtool having a heed fomxcd with s. sharply defined name confining Vgpx-utenze openmg rearwardly of. the heed, a cylindrical member having an. :imperforate wall, and a shank carried bysaid head received in Said cylindrical member forming therewith an annular combustion chamber, said com` bustion chamber directing the name against said head and into said groove. l Y JOSEPH L. ROBERTS.

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